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            <h1 id="seo-header">『开发』使用JXL.jar实现JAVA对EXCEL的读写操作</h1>
            
            
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                <h1 id="『开发』使用-JXL-jar-实现-JAVA-对-EXCEL-的读写操作"><a href="#『开发』使用-JXL-jar-实现-JAVA-对-EXCEL-的读写操作" class="headerlink" title="『开发』使用 JXL.jar 实现 JAVA 对 EXCEL 的读写操作"></a>『开发』使用 JXL.jar 实现 JAVA 对 EXCEL 的读写操作</h1><p><strong>简介：</strong><br>jxl.jar 是通过 java 操作 excel 表格的工具类库</p>
<p>jxl 操作 excel 包括对象 Workbook（工作簿），Sheet（工作表） ，Cell（单元格）。</p>
<p>一个 excel 就对应一个 Workbook 对象。</p>
<p>一个 Workbook 可以有多个 Sheet 对象。</p>
<p>一个 Sheet 对象可以有多个 Cell 对象。</p>
<p>读取 Excel 操作<br>通过 Workbook，Sheet ，Cell 这三个对象我们就可以实现 Excel 文件的读取工作。</p>
<p><strong>读取步骤：​</strong></p>
<p>1、 选取 Excel 文件得到工作薄</p>
<figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><code class="hljs cpp">Workbook workbook = Workbook.<span class="hljs-built_in">getWorkbook</span>(<span class="hljs-keyword">new</span> <span class="hljs-built_in">File</span>(<span class="hljs-string">&quot;myfile.xls&quot;</span>));<br></code></pre></td></tr></table></figure>

<p>2、 选择工作表，通过 Workbook 的 getSheet 方法选择第一个工作表（从 0 开始）</p>
<figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><code class="hljs cpp">Sheet sheet = workbook.<span class="hljs-built_in">getSheet</span>(<span class="hljs-number">0</span>);<br></code></pre></td></tr></table></figure>

<p>3、 选择 Cell</p>
<p>读取单元格</p>
<p>通过 Sheet 的 getCell 方法选择位置为 C2 的单元格（两个参数都从 0 开始）</p>
<figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><code class="hljs cpp">Cell c2 = sheet.<span class="hljs-built_in">getCell</span>(<span class="hljs-number">2</span>,<span class="hljs-number">1</span>);<br></code></pre></td></tr></table></figure>

<p>4、 读取信息 ​</p>
<p>通过 Cell 的 getContents 方法读取单元格的值</p>
<figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><code class="hljs cpp">把单元格中的信息以字符的形式读取出来String stringc2 = c2.<span class="hljs-built_in">getContents</span>();<br></code></pre></td></tr></table></figure>

<p>Cell 提供了一个 getType 方法</p>
<p>能够返回单元格的类型信息，同时 JXL 提供了一个 CellType 类用来预设 Excel 中的类型信息，而且 JXL 提供了一些 Cell 类的子类用来分别用来表示各种类型的单元格，如 LabelCell，NumberCell，DateCell 分别表示字符、数值、日期类型的单元格</p>
<p>5、释放资源：</p>
<figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><code class="hljs cpp">workbook.<span class="hljs-built_in">close</span>()<br></code></pre></td></tr></table></figure>

<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br></pre></td><td class="code"><pre><code class="hljs java"><span class="hljs-keyword">import</span> java.io.File;<br><span class="hljs-keyword">import</span> java.io.IOException;<br><br><span class="hljs-keyword">import</span> jxl.Sheet;<br><span class="hljs-keyword">import</span> jxl.Workbook;<br><span class="hljs-keyword">import</span> jxl.read.biff.BiffException;<br><br><span class="hljs-comment">/**</span><br><span class="hljs-comment"> * jxl读excel</span><br><span class="hljs-comment"> *</span><br><span class="hljs-comment"> * <span class="hljs-doctag">@author</span> jianggujin</span><br><span class="hljs-comment"> *</span><br><span class="hljs-comment"> */</span><br><span class="hljs-keyword">public</span> <span class="hljs-keyword">class</span> <span class="hljs-title class_">JxlReadDemo</span><br>&#123;<br>   <span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">main</span><span class="hljs-params">(String[] args)</span> <span class="hljs-keyword">throws</span> BiffException, IOException<br>   &#123;<br>      <span class="hljs-type">File</span> <span class="hljs-variable">xlsFile</span> <span class="hljs-operator">=</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">File</span>(<span class="hljs-string">&quot;jxl.xls&quot;</span>);<br>      <span class="hljs-comment">// 获得工作簿对象</span><br>      <span class="hljs-type">Workbook</span> <span class="hljs-variable">workbook</span> <span class="hljs-operator">=</span> Workbook.getWorkbook(xlsFile);<br>      <span class="hljs-comment">// 获得所有工作表</span><br>      Sheet[] sheets = workbook.getSheets();<br>      <span class="hljs-comment">// 遍历工作表</span><br>      <span class="hljs-keyword">if</span> (sheets != <span class="hljs-literal">null</span>)<br>      &#123;<br>         <span class="hljs-keyword">for</span> (Sheet sheet : sheets)<br>         &#123;<br>            <span class="hljs-comment">// 获得行数</span><br>            <span class="hljs-type">int</span> <span class="hljs-variable">rows</span> <span class="hljs-operator">=</span> sheet.getRows();<br>            <span class="hljs-comment">// 获得列数</span><br>            <span class="hljs-type">int</span> <span class="hljs-variable">cols</span> <span class="hljs-operator">=</span> sheet.getColumns();<br>            <span class="hljs-comment">// 读取数据</span><br>            <span class="hljs-keyword">for</span> (<span class="hljs-type">int</span> <span class="hljs-variable">row</span> <span class="hljs-operator">=</span> <span class="hljs-number">0</span>; row &lt; rows; row++)<br>            &#123;<br>               <span class="hljs-keyword">for</span> (<span class="hljs-type">int</span> <span class="hljs-variable">col</span> <span class="hljs-operator">=</span> <span class="hljs-number">0</span>; col &lt; cols; col++)<br>               &#123;<br>                  System.out.printf(<span class="hljs-string">&quot;%10s&quot;</span>, sheet.getCell(col, row)<br>                        .getContents());<br>               &#125;<br>               System.out.println();<br>            &#125;<br>         &#125;<br>      &#125;<br>      workbook.close();<br>   &#125;<br>&#125;<br></code></pre></td></tr></table></figure>

<p><strong>写入 excel 操作</strong><br>通过 WritableWorkbook，WritableSheet，Label 这三个对象我们就可以实现 Excel 文件的插入工作。</p>
<p>1、 创建可写入的 Excel 工作薄</p>
<p>WritableWorkbook wwb &#x3D; Workbook.createWorkbook(new File(“myfile.xls”));</p>
<p>2、创建工作表</p>
<p>WritableSheet ws &#x3D; wwb.createSheet(“通讯录”, 0);</p>
<p>3、创建单元格</p>
<p>添加文本类单元格</p>
<p>Label labelC &#x3D; new Label(0, 0, “This is a Label cell”);</p>
<p>ws.addCell(labelC);</p>
<p>4、写入到文件</p>
<p>wwb.write();&#x2F;&#x2F; 写入数据</p>
<p>5、释放资源：</p>
<p>wwb.close();&#x2F;&#x2F; 关闭文件</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br></pre></td><td class="code"><pre><code class="hljs java"><span class="hljs-keyword">import</span> java.io.File;<br><span class="hljs-keyword">import</span> java.io.IOException;<br><br><span class="hljs-keyword">import</span> jxl.Workbook;<br><span class="hljs-keyword">import</span> jxl.write.Label;<br><span class="hljs-keyword">import</span> jxl.write.WritableSheet;<br><span class="hljs-keyword">import</span> jxl.write.WritableWorkbook;<br><span class="hljs-keyword">import</span> jxl.write.WriteException;<br><br><span class="hljs-comment">/**</span><br><span class="hljs-comment"> * jxl写Excel</span><br><span class="hljs-comment"> *</span><br><span class="hljs-comment"> * <span class="hljs-doctag">@author</span> jianggujin</span><br><span class="hljs-comment"> *</span><br><span class="hljs-comment"> */</span><br><span class="hljs-keyword">public</span> <span class="hljs-keyword">class</span> <span class="hljs-title class_">JxlWriteDemo</span><br>&#123;<br>   <span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">main</span><span class="hljs-params">(String[] args)</span> <span class="hljs-keyword">throws</span> IOException, WriteException<br>   &#123;<br>      <span class="hljs-type">File</span> <span class="hljs-variable">xlsFile</span> <span class="hljs-operator">=</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">File</span>(<span class="hljs-string">&quot;jxl.xls&quot;</span>);<br>      <span class="hljs-comment">// 创建一个工作簿</span><br>      <span class="hljs-type">WritableWorkbook</span> <span class="hljs-variable">workbook</span> <span class="hljs-operator">=</span> Workbook.createWorkbook(xlsFile);<br>      <span class="hljs-comment">// 创建一个工作表</span><br>      <span class="hljs-type">WritableSheet</span> <span class="hljs-variable">sheet</span> <span class="hljs-operator">=</span> workbook.createSheet(<span class="hljs-string">&quot;sheet1&quot;</span>, <span class="hljs-number">0</span>);<br>      <span class="hljs-keyword">for</span> (<span class="hljs-type">int</span> <span class="hljs-variable">row</span> <span class="hljs-operator">=</span> <span class="hljs-number">0</span>; row &lt; <span class="hljs-number">10</span>; row++)<br>      &#123;<br>         <span class="hljs-keyword">for</span> (<span class="hljs-type">int</span> <span class="hljs-variable">col</span> <span class="hljs-operator">=</span> <span class="hljs-number">0</span>; col &lt; <span class="hljs-number">10</span>; col++)<br>         &#123;<br>            <span class="hljs-comment">// 向工作表中添加数据</span><br>            sheet.addCell(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Label</span>(col, row, <span class="hljs-string">&quot;data&quot;</span> + row + col));<br>         &#125;<br>      &#125;<br>      workbook.write();<br>      workbook.close();<br>   &#125;<br>&#125;<br></code></pre></td></tr></table></figure>

<p><strong>更新 excel 操作</strong><br>1、创建只读的 Excel 表副本</p>
<p>Workbook workbook &#x3D; Workbook.getWorkbook(file);</p>
<p>2、创建可写入的 Excel 工作薄</p>
<p>WritableWorkbook writableWorkbook &#x3D; Workbook.createWorkbook(file, workbook);</p>
<p>3、其他操作与写入 excel 操作类似</p>
<p><img src="https://img-blog.csdnimg.cn/20200413233424461.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzYyNzExOA==,size_16,color_FFFFFF,t_70" srcset="/img/loading.gif" lazyload alt="在这里插入图片描述"></p>
<br>
<br>
<br>

<blockquote>
<p><strong><em>写在最后:</em></strong><br>我叫风骨散人，名字的意思是我多想可以不低头的自由生活，可现实却不是这样。家境贫寒，总得向这个世界低头，所以我一直在奋斗，想改变我的命运给亲人好的生活，希望同样被生活绑架的你可以通过自己的努力改变现状，深知成年人的世界里没有容易二字。目前是一名在校大学生，预计考研，热爱编程，热爱技术，喜欢分享，知识无界，希望我的分享可以帮到你！<br>如果有什么想看的，可以私信我，如果在能力范围内，我会发布相应的博文！<br>感谢大家的阅读！😘 你的点赞、收藏、关注是对我最大的鼓励！</p>
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